| // Copyright 2015 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #import "ios/web/web_state/ui/wk_back_forward_list_item_holder.h" |
| |
| #include "base/memory/ptr_util.h" |
| #import "ios/web/public/navigation_item.h" |
| |
| #if !defined(__has_feature) || !__has_feature(objc_arc) |
| #error "This file requires ARC support." |
| #endif |
| |
| namespace web { |
| |
| namespace { |
| // Private key used for safe conversion of base::SupportsUserData to |
| // web::WKBackForwardListItemHolder in |
| // web::WKBackForwardListItemHolder::FromNavigationItem. |
| const char kBackForwardListItemIdentifierKey[] = |
| "BackForwardListItemIdentifierKey"; |
| } |
| |
| WKBackForwardListItemHolder::WKBackForwardListItemHolder() |
| : navigation_type_(WKNavigationTypeOther) {} |
| |
| WKBackForwardListItemHolder::~WKBackForwardListItemHolder() {} |
| |
| // static |
| WKBackForwardListItemHolder* WKBackForwardListItemHolder::FromNavigationItem( |
| web::NavigationItem* item) { |
| DCHECK(item); |
| base::SupportsUserData::Data* user_data = |
| item->GetUserData(kBackForwardListItemIdentifierKey); |
| if (!user_data) { |
| user_data = new WKBackForwardListItemHolder(); |
| item->SetUserData(kBackForwardListItemIdentifierKey, |
| base::WrapUnique(user_data)); |
| } |
| return static_cast<WKBackForwardListItemHolder*>(user_data); |
| } |
| |
| } // namespace web |